. Elementary entomology. Entomology. THE TRUE BUGS 125 (Cercopidae) are called "' frog-hoppers" or "; Within this frothy mass the little nymph molts and grows and finally forms a little clear space about its body, around which the foam dries, forming a little chamber within which it transforms to the adult. Though very commonly in evidence, few of this family are injurious. The leaf-hoppers {Jassidae) are among the most abundant of the Homoptera. Take a net and sweep back and forth in any meadow and you will secure hundreds of them. Professor Herbert Osborn
. Elementary entomology. Entomology. THE TRUE BUGS 125 (Cercopidae) are called "' frog-hoppers" or "; Within this frothy mass the little nymph molts and grows and finally forms a little clear space about its body, around which the foam dries, forming a little chamber within which it transforms to the adult. Though very commonly in evidence, few of this family are injurious. The leaf-hoppers {Jassidae) are among the most abundant of the Homoptera. Take a net and sweep back and forth in any meadow and you will secure hundreds of them. Professor Herbert Osborn having estimated that frequently over a million live on an acre of grassland. They are more slender than the two preceding families, from an eighth to a fourth of an inch long, and of a brownish, green, or red color, the green and red often being arranged in stripes, giving a very striking coloration. The grape leaf-hopper {TypJilo- cyba comes), commonly called the grape thrips (although it is not a true thrips), is the most serious enemies of the vine. In late summer the foliage will often be brown as a result of their work, and a slight jar will cause them to fly off in clouds. They are small yellowish hoppers, scarcely an eighth of an inch long and strikingly marked with red and black. A yellowish-green species, the rose leaf-hopper {Eiupoasca jvsac), often does considerable injury to rose foliage, and a similar one, the apple leaf-hopper {Eiupoasca mali), is found on the apple and frequently becomes a serious pest in the nursery. The presence of these leaf-hoppers is always indicated by the numerous white cast skins of the nymphs clinging to the undersides of the leaves. Leaf-hoppers fly to lights in large numbers. They hibernate as adults, and the eggs are usually laid just beneath the surface of the leaf of the food Fig. 171. ApJnvphora 4-notata Say, a common frog-hopper (After Lugger). Please note that these images are extracted from scanned page images th
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Keywords: ., bookcentury1900, bookdecade1, booksubjectentomology, bookyear1912
